Erotic pictures went to far

Awhile ago me and my friend started taking erotic pictures of each other.
We are two females and between us we have a good set up of equipment, my flat is like a studio now, lighting and other props are on display all the time.
We are amateurs but enjoy trying to be creative with the naked body.
My brother is one of the very few people who have seen some of our work, on one occasion while viewing images of us he said, it’s good but it’s a bit repetitive, he said he is seeing a very similar picture all the time.
He said why don’t we seek professional advice the internet can’t teach you everything.
My friend said that’s very expensive can you not help, my brother said what can I offer, my friend said it’s all well and good you commenting after we have taken pictures, how about adding your opinion why we are doing it, can give it a try he said.
No time like the present my friend said and quickly started setting up.
We explained what we were trying to achieve in the photo, his comments helped a lot, he said I don’t think you’re going to get that picture you want because you two know each other so well the professionalism is just not there, you are to comfortable with each other.
Point taken my friend said, you get in front of the camera, when he got in position my friend said not with your clothes on, my friend had to go into detail about catching the erotic moments and that can’t be done with clothes on.
My brother now naked and covering his bits with his hands got into position with me, first we tried the looking into each other eyes, then the going for the kiss, embracing each other, my friend said nope let’s swap places, wow what a difference that made, you could clearly see a sexual image.
My brother is now resting his head on my friend breast and he starts getting an erection, I said do you have too, can’t help it he said, my friend then said hang on and started giving me lots of different camera settings, she moved lights, screens and props then said to my brother, get hard again and we can try something different.
I can’t just get hard like that, it was the moment that got me hard last time, ok let’s just try then, it wasn’t long and my brother was hard, I got some good pictures, close ups with good lighting and some really good passionate ones, my friend was getting carried away, she was really getting excited and so was my brother, he started dripping pre cum, after cleaning up we continue and so did my brother.
My friend said let’s try this way, he was behind her and giving her a kiss on the back of the neck, then they were laying down doing the same pose, my friend was laying on her side arm was over her head and my brother behind her, I then see my friend body and legs moving, my brother is fucking her, I said what are you doing, my friend said to me, carry on, she told my brother to stop and hold deep in her, her arm and neck at full stretch, then my brother started fucking her fast, my friend stopped him, we changed positions so many times, my brother was hard all the time but I managed to not get him hard in any pictures.
When we stopped my brother went to the toilet, no guessing what for!
When my brother left me and my friend viewed the images, I must admit we got some incredible erotic pictures.